Peters



L. P. SHERMAN.

v DOOR-SPRING.

No. 192,602. Patented Jul 3,1877.

N PETERS, PHOTO-UTHOGRAPHER WASH NGTON D C LEWIS P. SHERMAN, OF BIDDEFORD,

MAINE, ASSIGNOR OF ONE-HALF HIS RIGHT TO PERLEY M. BERRY, OF SAME PLACE.

IMPROVEMENT 5N DQOR-SPRINGS.

Specification forming part of Letters Patent No. 192,602., dated July 3, 1877; application iiled anuary 22, 1877.

To all whom it may concern Be it known that I, LEWIS P. SHERMAN, of Biddeford, in the county of York and State of Maine, have invented certain new and useful Improvements in Door-Springs; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

Figure 1 is a perspective view of the invention attached to a door. Fig. 2 is a detail of bracket 0 and arm j. Fig. 3 is a detail of spring and rings.

Similar letters of reference relate to corre-' sponding parts.

This invention relates to a new and improved apparatus for closing and holding door or gate, and its operations, are as fol lows: a is a spiral or coil wire spring, having any convenient number of coils. On either end of the coil-sprin g are firmly fixed sockets or rings. The ring I), at the lower end, is provided with notches or teeth. The ring 0, at

the upper end, has the arm 61, and at the end of the arm is the roll 6. Through the coilspring passes a metallic rod, 1), the lower end of which rests on the bracket f, and the up per part is held in place by the bracket 9, which has its upper side corrugated. The bracket f is provided with notches or teeth to match into those of the ring I).

The brackets are attached to the door-frame or gatepost by 'screws or any convenient method.

h and t are two lever-arms, pivoted at k. h is attached to the door by means of a plate. i is attached to the arm j, which is secured to the bracket g by a screw, and its position is regulated by a stud on the under side, which fits into the corrugations of the bracket g.

When in use the different parts of the device will have positions similar to those shown in Fig. 1.

When it is desired to use the invention with a common wrench, the ring I) can be turned so that the coil-spring shall be wound up tightly. The teeth of the ring b, fitting into the teeth of the bracket f, hold it firmly in place. This, of course, will cause the ring 0 to revolve, so that the roll 6 on the arm d will press against lever-arm c. When the door or gate is thrown open this pressure will be very great, and the recoil of the spring will cause it to close quickly.

The arm j and the arm at may be so arranged with reference to each other that when the door or gate is thrown open the roller 0 will pass backwardly on the lever-arm i, so near to the pivot which unites i with j that it will hold the door or gate open.

When the roller-arm first begins to operate to close the door it presses with considerable force on the arm t but the leverage is very small. As itpasses along on the arm the spring is nncoiled, and the force is very much diminished, and the door or gate is closed without slamming or violence.

It will thus be seen that my invention can be very conveniently applied to any door or gate, and can be very quickly and easily adjusted.

\Nhat I claim as my invention, and desire to secure by Letters Patent, is-- l. The combination of rings 12 and c, spiral coil-spring a, metallic rod b, brackets f and 9, arm (I, roller 6, arm j, and pivoted arms h and '5, arranged and operating as described.

The combination of the brackets f and g, the latter having corrugations on its upper surface, ring 12, ring a, spiral coil-spring a, rod b, arm j,roller-arm d, and pivoted arms h and 2', arranged, operated, and attached as described.

In testimony that 1 claim the foregoing as my own I affix my signature in presence of two witnesses.

LEWIS P. SHERMAN. Witnesses:

WILLIAM HENRY CLIFFORD, HERBERT G. Bnrees. 

